[Issue 20789] is(T: U) doesn't exclude deprecated alias calls with -de

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20789

Dlang Bot <dlang-bot at dlang.rocks> changed:

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--- Comment #1 from Dlang Bot <dlang-bot at dlang.rocks> ---
@FeepingCreature created dlang/dmd pull request #11081 "Fix issue 20789: -de
should disable is(T : U) if T alias-this to U is deprecated" fixing this issue:

- Fix issue 20789: don't indicate deprecated alias this or alias this of
deprecated symbol as implicit conversion in is() when -de (deprecations as
errors) is on.

https://github.com/dlang/dmd/pull/11081

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